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esp_system
Anton Maklakov 3c8a1390a0 Merge branch 'bugfix/esp-system-warnings' into 'master' %!s(int64=3) %!d(string=hai) anos
..
include bd8b03888c esp_system: Tidy up INT WDT %!s(int64=3) %!d(string=hai) anos
ld b5de3ec953 esp_common: rename EXT_RAM_ATTR to EXT_RAM_BSS_ATTR to make it clearer %!s(int64=3) %!d(string=hai) anos
port 3c8a1390a0 Merge branch 'bugfix/esp-system-warnings' into 'master' %!s(int64=3) %!d(string=hai) anos
test 7c02bde904 esp_system: Update task watchdog unit tests and example %!s(int64=3) %!d(string=hai) anos
test_apps b920676e59 pm: add test for RTC using 8MD256 as clock source %!s(int64=3) %!d(string=hai) anos
test_eh_frame_parser a9fda54d39 esp_hw_support/esp_system: Re-evaluate header inclusions and include directories %!s(int64=3) %!d(string=hai) anos
CMakeLists.txt 595df1d3fa Merge branch 'refactor/move_rtc_ctrl_to_esp_hw_support' into 'master' %!s(int64=3) %!d(string=hai) anos
Kconfig 9a763f4ff2 esp32c2: Enable IRAM/DRAM split using PMP %!s(int64=3) %!d(string=hai) anos
README.md 32aa5f7e25 esp_system: add notes on timekeeping %!s(int64=4) %!d(string=hai) anos
app.lf bbc599493e esp32: move common fragment definitions %!s(int64=4) %!d(string=hai) anos
crosscore_int.c a8c3fe56c8 This commit add to GDBstup: %!s(int64=3) %!d(string=hai) anos
debug_stubs.c bb9cd84cdc debug_stubs: Refactor and add support for RISCV %!s(int64=4) %!d(string=hai) anos
eh_frame_parser.c a9fda54d39 esp_hw_support/esp_system: Re-evaluate header inclusions and include directories %!s(int64=3) %!d(string=hai) anos
esp_err.c c16ceafa5c esp_common: move esp_err %!s(int64=4) %!d(string=hai) anos
esp_ipc.c 483149e41b global: fix some potential out-of-bounds issue %!s(int64=3) %!d(string=hai) anos
esp_system.c 27f5c90e2e freertos: Fix usage of vTaskSuspendAll()/xTaskResumeAll() %!s(int64=3) %!d(string=hai) anos
fpga_overrides.c 09487761cf ESP8684: add freertos, hal, esp_system support %!s(int64=4) %!d(string=hai) anos
freertos_hooks.c 9274a062fb esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies %!s(int64=3) %!d(string=hai) anos
int_wdt.c bd8b03888c esp_system: Tidy up INT WDT %!s(int64=3) %!d(string=hai) anos
linker.lf 9069f70db3 system: add option to enable undefined behavior sanitizer (UBSAN) %!s(int64=4) %!d(string=hai) anos
panic.c 9274a062fb esp-system: removed esp_phy and nvs dependencies, change app update and pm to weak dependencies %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename bb88338118 system: move kconfig options out of target component %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename.esp32 0687daf2c8 kconfig: move remaining kconfig options out of target component %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename.esp32c3 d2872095f9 soc: moved kconfig options out of the target component. %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename.esp32h2 d2872095f9 soc: moved kconfig options out of the target component. %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename.esp32s2 d2872095f9 soc: moved kconfig options out of the target component. %!s(int64=3) %!d(string=hai) anos
sdkconfig.rename.esp32s3 d2872095f9 soc: moved kconfig options out of the target component. %!s(int64=3) %!d(string=hai) anos
stack_check.c a9fda54d39 esp_hw_support/esp_system: Re-evaluate header inclusions and include directories %!s(int64=3) %!d(string=hai) anos
startup.c 81f2a94f9a esp_system: make dependencies on vfs and esp_wifi optional %!s(int64=3) %!d(string=hai) anos
system_time.c cf049e15ed esp8684: rename target to esp32c2 %!s(int64=4) %!d(string=hai) anos
task_wdt.c 8af172ec46 esp_system: FIx TWDT SMP FreeRTOS unicore build error %!s(int64=3) %!d(string=hai) anos
ubsan.c 0d86151b82 esp_system: fix ubsan builtins' prototypes to suppress Wbuiltin-declaration-mismatch %!s(int64=3) %!d(string=hai) anos
xt_wdt.c 9ab4abfb46 hw_support: move rtc_ctrl from driver to hw_support %!s(int64=3) %!d(string=hai) anos

README.md

System Notes

Timekeeping

The following are the timekeeping mechanisms available and their differences:

  1. System time (esp_system_get_time)

Time with the origin at g_startup_time. The implementation is not handled by esp_system, but it does provide a default implementation using RTC timer. Currently, esp_timer provides system time, since the hardware timers are under the control of that component. However, no matter the underlying timer, the system time provider should maintain the definition of having the origin point at g_startup_time.

  1. esp_timer time (esp_timer_get_time)

This is the time read from an underlying hardware timer, controlled through config. Origin is at the point where the underlying timer starts counting.

  1. newlib time (gettimeofday)

Timekeeping function in standard library. Can be set (settimeofday) or moved forward/backward (adjtime); with the possibility of the changes being made persistent through config. Currently implemented in terms of system time, as the point of origin is fixed. If persistence is enabled, RTC time is also used in conjuction with system time.

  1. RTC time (esp_rtc_get_time_us)

Time read from RTC timer.